Table 4.

Means ± Standard Deviations for the Cognitive Performance Measures of Glaucoma Patients and Healthy Controls as well as the Outcomes of the ANCOVA

	Single Task						Dual Task
Condition	Letter Fluency Task (n) (easy)	Letter Fluency Task (n) (severe)	Reaction Time Task (s) (easy)	Reaction Time Task (s) (severe)	N-Back Task (n) (easy)	N-Back Task (n) (severe)	Letter Fluency Task (n) (easy)	Letter Fluency Task (n) (severe)	Reaction Time Task (s) (easy)	Reaction Time Task (s) (severe)	N-Back Task (n) (easy)	N-Back Task (n) (severe)
Control (N = 28)	37.71 ± 11.025	30.46 ± 10.171	0.952 ± 0.146	0.889 ± 0.117	29.46 ± 1.170	22.32 ± 5.787	35.68 ± 11.447	29.32 ± 9.452	1.004 ± 0.146	0.945 ± 0.118	28.79 ± 1.792	22.54 ± 5.029
Glaucoma (N = 18)	38.83 ± 9.051	32.44 ±9.513	1.000 ± 0.107	0.898 ± 0.096	28.78 ± 2.713	24.50 ± 3.930	36.44 ± 11.041	31.28 ± 10.621	0.988 ± 0.134	0.934 ± 0.097	29.50 ± 1.465	22.44 ± 5.216
Repeated measures ANCOVA
Condition × Group					Group				Condition
F2.30.94.250 = 0.287					F1,41 = 0.112				F2.30,94.25 = 0.894
P = 0.781, ${\eta }_{\mathrm{p}}^2$ = 0.007					P = 0.740, ${\eta }_{\mathrm{p}}^2$ = 0.003				P = 0.425, ${\eta }_{\mathrm{p}}^2$ = 0.021